Thomas Beaufort, Duke of Exeter

Thomas Beaufort (~1377 - 1426) was the third of the four children of John of Gaunt, Duke of Lancaster, and his mistress Katherine Swynford. He was legitimated when the others were, in 1390 and again in 1397. He was Chancellor of England (1410-1412) and was created Earl of Dorset[?] (1411) and Duke of Exeter (1416). He married a Margaret Neville[?] (there were a lot of Margarets and a lot of Nevilles around the royal circle then, but this one was the daughter of Thomas Neville of Horneby). They had only one child, Henry Beaufort[?], and he died young.